Rotary valve



Patented May 2, 1 922.

INVENTOR ATTORNEY set to provide "E s'r ARTHUR DICKERSON, OF SALT LAKE CITY, UTAH, ASSIGNOB 'IO DIC KERSON ENGINE COMPANY, OF SALT LAKE CITY, UTAH, A COBIEOBATION.

, ROTARY verve.

T call whom it may camera.- I

Be it known that I, ARTHU DIOKERSON, a citizen of the United States,residing at Salt Lake City, in the county of Salt Lake and State of Utah, have invented certain new and useful Improvements in Rotary Valves, of'which the following is a specification.

My invention relates to valves for internal combustion engines, and has'for its oba rotary valvestem with ports cut-therein and von which are carried packing sleeves with ports cut therein which coact with the ports ofsaid valve stem to allow gas to pass to the cylinders of an engine and exhaust therefrom, and to prevent the expansion and contraction ofthe valve and its casing due to the heat of the exploded gas inthe engine from interfering'with the operation of the valve.

These objects I accomplish with the device illustrated in the accompanying drawings in which similar letters-and numerals of reference indicate like parts throughout the several views and as describedin the specification' forming a part of this application and pointed out in the appended claims.

In the drawings in which I have shown a substantial embodiment of my invention, Figure 1 is a view in perspective of the valve casing with the valve in place therein, parts cut away. Figure 2 is a plan viewof the valve stem with two of the bearing sleeves thereon and two portions of the valve stem without the sleeves. Figure 3 is a view in perspective of one of the bearing sleeves. Figure 4: is a section on line H of Figure 2.

In operating the rotary valve patented to me on May 27th, 1919, No. 1,304,744, in connection with an internal combustion engine, I have found that under the extreme expansion of continuous use with heavy loads that the valve will stick or become so expanded as to not act with the rapidity and accuracy required, and to obviate such difliculties I have provided a solid metal valve stem A having segments cut out to form combined ports of ingress and egress 1, one of which ports is provided for each cylinder. The said valve stem has a portion adjacent each of said ports 1 concentrically turned off to less diameter than the main portions of Specification of Lettersiatent. Patented 192 2, I p le-am filed-February 15,1921 Serial No. teams;

periphery of said valve stem, and each of said sleeve bearings has a segment portion cut therefrom in alinement with the said ports 1 of the stem, as shown at 3; The

diameter of the bore of eachof said sleeve said-ports 1, as shown at 4, which space prevents the expansion of the parts to such an extent as "will interfere with the proper functioning of the valve.

I'provide a valve case within which the valve is operated consisting of two plates D and E which are bolted together and the bottom plate E- is bolted on the upper end of the engine cylinders as a closure therefor. The said plate E is semi-cylindrically recessed throughout its length, as at5, to form part of the bearing for-said valve, and

from the bottom of said recess, the ports 6 are out, which ports exit centrally to the interior of each cylinder. The said plate D is also semi-cylindrically recessed, as at 7, throughout its length to coact with the .said recess 5 as a bearing for the said valve. The said plates I) and E have the ingress ports 8 cut through their side walls, a portion in each plate, connecting the intake manifold of the engine with the ports 1 of the valve,

also onthe opposite side from said ports 8 are cut the exhaust ports 9, a portion in veach plate, connecting the exhaust manifold of the engine with the said ports 1 of the valve. Lubricating openings 10' are provided in said plate D to admit oil to each end of said sleeve bearings B. The said sleeve bearings are fastened to said stem by the 'tapscrews 11. The operation of the valve isasfollows z-ewith the valve stem A,

geared or otherwise connected with they crankshaft of the engine, it will be rotated synchronously with the crank shaft of the engine and timed in unison with the action of the pistons of said engine. The explosive gas will be drawn from the intake manifold of the engine through the respective ports 8.0f the casing and ports of the 1 valve; and as directed by said ports 1 into the cylinder chambers through the respective ports 6. l/Vhen the gas in any particular cylinder has been fired,the next stroke of its piston will drive the exploded gas out through said port 6; port 1 and the exhaust} port 97 The uncut portions of the said sleeve bearings B will act as closures for the respective .ports 6 of the plate E of the en gine and the heat 'ofjthe explosions will be directly against the'sleeve bearings 13 and as the wall of each is comparatively thin the expansion will be limited" and the. tempera I ture; will be absorbed bythe valve casings D and E. The space 4 surrounding the valve stem adjacent the ports 1" and 3 will prevent the'valve from coming in contact with and overheating said sleeve bearings when the said stem expands under-the heat c of the explosions.

I thus provide a new and novel valve stem coacting with "new sleeve bearings to form a new rotary valve for use with internal combustion cylinders. As will beobvious the same space 4: may be provided by counter boringthe interior'of said sleeve bearings adjacent the ports 3 therein, and

having described my invention. I desire to secure by Letters Patent and claim 1. A rotary valve comprising a valve stem having segments :cut therefrom to form ports other portions of's aid valve stein adjacent said 'portshavin'g lessdiameterthan the 'main portions of said stem; cylindrically shaped bearing sleeves secured on said stem with an interior bore fitt ng the main portion's-of said stem'and spaced from the portions offsaid stem h'aving less diameter; with segment ports cut-infsaid;sleeve bearing allnement with the ports ofosa dvalvestem.

andspaced concentrically from the smaller portions of said stem and closely fitting the other portions thereof; and ports in said sleeves in alinement with the ports in said valvestem. .7.

In testimony whereof I have affixed my signature.

ARTHUR DicK Rso j 40 '2 2. In arotaryvalve the combination with 

